A modified version of Rijndael algorithm implemented to analyze the cyphertexts correlation for switched S-Boxes

Author

Cretu, Marian ; Apostol, Cristian-Gabriel

Author_Institution

Fac. of Electron., Telecommun. & Inf. Technol., Politeh. Univ. of Bucharest, Bucharest, Romania

fYear

2012

fDate

21-23 June 2012

Firstpage

331

Lastpage

334

Abstract

There are more than eleven years since Rijndael algorithm was declared the winner of the NIST contest for the new AES election. All this time the original algorithm was analyzed and attacked by cryptanalysts and hackers in order to find its vulnerabilities. The modified version of Rijndael we analyze in this paper randomly changes the accessing order of S-Boxes implemented in the source code of the original algorithm, due to affine transformation and inverse matrix properties. The goal is to obtain two different cyphertexts, keeping the plaintext and the secret key. For this to be possible, a PRNG designed by Gorge Marsaglia was implemented in the software solution.

Keywords

affine transforms; cryptography; matrix algebra; AES election; NIST contest; Rijndael algorithm; affine transformation; cryptanalysts; cyphertexts correlation; hackers; inverse matrix properties; plaintext; secret key; software solution; source code; switched S-boxes; Algorithm design and analysis; Correlation; Encryption; Magnetic resonance imaging; Polynomials; Software algorithms; AES; PRNG; Rijndael; correlation; histogram;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications (COMM), 2012 9th International Conference on

Conference_Location

Bucharest

Print_ISBN

978-1-4577-0057-6

Type

conf

DOI

10.1109/ICComm.2012.6262548

Filename

6262548